Rock or coal drilling machine



(No Model.)

C. B. DAWSON.

ROOK 0R GOAL DRILLING MACHINE.

UNITED STATES PATENT FFICE. 'l

CHARLES B. DAWSON, OF ANGUS,` IOVA.

ROCK OR COAL DRILLINGSMACHINE.y

SPECIFICATION forming part of Letters Patent No. 421,821, dated February 18, 1890.

Application filed September 2l, 1885. Serial 110.177,735. (No model.)

T all whom t may concern:

Be it known that I, CHARLES B. DAWSON, a citizen of the United States of America, and

va resident of Angus, in the 'county of Boone and State of Iowa, have invented an Improved Rock or-Coal Drilling Machine, of which the following is a specification.

My invention relates to the driving and feed- :ing mechanism of the machine described in my application for Letters Patent of the United States filed June 23, 1883, Serial No. 99,206; and it consists in the construction and combination of a frame having bearings to support a rotating shaft and a rotating cylinder at right angles to each other, an annular gear, a driving-shaft having a bevel-gear, a bevelgear having journals on its side face to carry three small Wheels and a recess to admit a small gear-wheel, a tubular shaft having a xed gear-wheel, an auxiliary frame, journalbox, 'and shaft-support combined, a screwthreaded drill-shaft, and a screw-threaded cylinder or feed device in such a manner that power and motion can be imparted direct from the driving-shaft to rotate and advance the drill-shaft through the stationary feed device in a common way to form a bore in coal or other soft substances, and also in such a manner that the drill-shaft and the feed devicecan be simultaneously rotated at different rates of speed to advance the drillshaft slowly while boring in rock or other hard substances, and at the same time increase the power ofthe machine.

Figure l of the accompanying drawings is a top view of the mainframe. Fig. 2 is a top view showing all the parts combined. Fig. 3 is a longitudinal section, and Fig. 4 a top view, of the cylindrical feed device;l Fig. 5

is a face view of the annular gear; Fig. 6, an edge view of the annular gear and the bevel gear-wheel carrying the small wheels. Fig. 7 is a face view of thel bevel-gear carrying the Wheels, and also of the gear-wheel on a tubular shaft. Fig..8 is a sectional view of desired.

B2 is an annular gear formed on or fixed to the frame in a concentric position with the bearing A3, through which the driving-shaft C and a tubular sliding shaft are extended.

C is a bevel-gear fixed on the end of the shaft C. l Y

D `is a bevel-gear placed loosely on the shaft C. f Y

l 2 3 are journals extending from the side face of the Wheel D, upon each of which journals is a small gear-wheel f.

D is a cavity in the side face and center of the wheel D, adapted to admit a gearwheel of corresponding size.v

D2 is a tubular shaft having a gear-.wheel D3 on its end that will fit in the cavity D of the wheel D and serve as a clutch device in such a manner that the tubular shaft D2 and the Wheel D can be rotated jointly whenever desired. f

G (shown in Figs. 2, 9, and l0) is an auxiliary frame having a journal-box G and a shaft-bearing G2 extending from its center. The ends of 'the radial arms of this frame are rigidly bolted fast to the rigidly-fixed annular gear B2 on the frame A in such amanner that the journaled end of the drivingshaft C will enter the journal-box G.

H is a cylindrical feed device having integral bevel-gears on its ends, supported in the bearing A2 of the frame A, and retained by means of a hinged cap in such a manner that it can be rotated, when desired, by means of the loose wheel D on the driving-shaft C.

The bore extending longitudinally through 9 the center of the cylinder is screw-threaded and adapted to engage and move a screwthreaded drill-shaft, as required to advance a drill while forming av bore in coal or rock.

J is a drill-shaft that has a socket at each end adapted to receive the shanks of interchangeable bits or angers and a screw-thread corresponding with the thread in the cylinder H, through which it extends from its bearing G on the end of the auxiliary frame.

K is a bevel-gear on the end of a sleeve K2, placed loosely upon the drill-shaft J, and connected therewith by means of a feather, that enters a longitudinal groove in the drillshaft in such a manner that they will rotate jointly whilethe drill-shaft is advanced by means of the feed device H.

m is a perforation in the tubular shaft D2. Two corresponding perforations extend through the driving-shaft C. To lock the tubular shaft D2, the driving-shaft C,and the wheel D together, I slide the tubular shaft toward the wheel C and allow the wheel D3 on,

its end to enter the cavity D in the face of the wheel D, and then pass a key or pin n through the coinciding perforations inthe two shafts D2 and C. When these parts are thus locked together, power applied to the driving-shaft C by means of g a crank or drivingwheel ou its end will rotate the wheels C and D simultaneously and power and motion.

will be transmitted from the wheel C to the wheel K to rotate the drill-shaft J, and from the wheel D to the feed device l-l, so that all the rotating parts will move in a common way to operate a drill on the end of the drill-shaft in coal.

To diminish the speed of the feed device ll and obtain a triple purchase to increase the power applied to the drill-shaft, as contemplated in boring rock, I withdraw the key n, slide the tubular shaft outward to make the perforation therein coincide with the outer perforation in the shaft C, and also to bring the wheel D3 on its end in contact with the three wheels f, carried by the wheel D, and then insert the key n again to lock the two shafts together. Power and motion will then be transmitted through the medium of the stationary annular gear B2 and augmented thereby, and the` increased power thus produced transmittedthrough the wheel D2 and cylinder l-l to the driving-shaft J, so that the feed device which advances the drill will also aid the wheels C and K to rotate the drill-shaft. The rotary speed of the feed device H will at all times be greater than the rotary speed of the drill-shaft, as required to impart a longitudinal movement to the drillshaft as it rotates.

To advance or retract the drill speedilyrelative to the substance that is to be bored, I simply withdraw the key n and rotate the shaft C to impart rotary motion to the wheels Cand K only while the feed device and other operative parts remain stationary.

I claim as my inventionl. The combination of the elbow-shaped frame having the bearing A2 and the annular gear B2, located wholly to one side of a line passing through the center of the bearing A2, secured to the frame of the feed-cylinder, having a gear at its end journaled in said bearing A2, the drive-shaft arranged at right angles to the axis of the feed cylinder and concentric with the annular gear B2, and the gearing interposed between and connecting the feed-shaft with the feed-cylinder, substantially as described.

2. The combination, with the frame having the bearing A2, the annular' gear B2, fastened to the frame, the feed-cylinder, and the drive-shaft, of the gear-wheel D, meshing with the feed-cylinder, mounted loosely on said shaft, and having a depression on its side, the gear-wheels f, journaled on the side of the gear-wheel and meshing with the gear B2, and the gear-wheel D3, placed on said shaft and adapted to move longitudinally thereon to mesh with said gear-wheels f or interlock with the gear-Wheel D, as and for the purpose specified.`

3. The combination of the frame A, having the bearing A2 at one end, the feed-cylinder H, journaled in said bearing A2, the annular gear B2, fastened tothe frame, the drive-shaft journaled in the frame, the gear- Wheel D, loosely mounted on the shaft, the gear-wheels f, journaled to the gear-wheel D and meshing with the annular gear B2, and the gear-wheel D2, placed on the shaft and adapted to move longitudinally thereon in and out of mesh with said gear-wheels f, substantially as and for the purpose set forth.

4. The combination, with the frame A, having the bearing A2 and the bearing A2, arranged at right angles to each other, the feedcylinder mounted in the bearing A2, the feedshaft J, the feed -gear K, having extension. K2, and the drive-shaft C, having a bearing at its outer end in the frame A, of the auxiliary frame G, secured to the frame A and having the bearing G2 to receive and support the extension K2 of the feed-gear K, and having the journal-box G to receive and support the outer end of the shaft C, substantially as shown and described.

5. The herein shown and described drilling-machine, composed of the frame A, having the bearings A2 A, the feed-cylinder jou rnaled in bearing A2, the shaft journaled in bearing A3, the annular gear B2, fastened to the frame, the gear-wheel D, loosely mounted IOO IIO

on said shaft and recessed on its face, the

gear-wheels f, meshing with the gear B2, journaled to the gear-wheel D, the gear-wheel D2, placed on the shaft and adapted to move thereon in and out of mesh With the gears f and D, the feed-shaft J, passed through the feed-cylinder, the feedgear K, mounted on the feed-shaft and held thereto by featherand-spline connection, the gearwheel C', keyed to the shaft and meshing with said feed-gear, the auxiliary frame G, fastened to frame A and having journal-box G2 for the feed-gear K, and bearing G for the outer end of the feed-shaft.

CHARLES B. DAWSON. lVitnesses:

R. Il. Onwic, THOMAS G. ORWIG. 

